I prefer to use source blocks for pretty much all my language learning.

I am trying to figure out generators in emacs-lisp but can't seem to run it in a block.

I have

```

#+begin_src emacs-lisp :results output

(setq lexical-binding t)

(require 'generator)

(iter-defun my-iter (x)

(let (val (iter-yield (1+ x)))

(iter-yield (1+ val)))

-1)

(let* ((it1 (my-iter 5))

(it2 (my-itr 0)))

(print (iter-next it1))

(print (iter-next it1 8))

(print (iter-next it2 nil))

(condition-case x

(iter-next it1)

(iter-end-of-sequence

(print (cdr x)))))

#+end_src

```

But running that gives me

> executing Emacs-Lisp code block...

> cl--assertion-failed: Assertion failed: lexical-binding

I thought that setting lexical-binding to t was enough, but apparently something else is needed?